And I believe Windows NT 4 (which had the Windows 95 UI) was the most stable version of NT for a while, even after Windows 2000 came out. Windows 2000 put the video driver in kernel space, which was faster than NT 4, but the early drivers were not great.

—-EDIT:

I misremembered. It was NT 3.51 that still had the video driver in userspace, NT 4 moved it into the kernel: https://en.m.wikipedia.org/wiki/Windows_NT_4.0